Stimulating catheter for continuous femoral nerve block: Salinas et al compared stimulating catheters vs. non-stimulating catheter in volunteers having femoral nerve block. They maintained a quadriceps evoked muscle twitch < 0.5 mA through the stimulating catheter . They reported a block success of 100% via the stimulating catheters versus 85% via the non-stimulating catheters (P = 0.07) and a much dense motor block and pain scores with SC as compared to NSC.